@tag is a string.
Why does this work:
tag_tracker = "<%= @tag %>";
alert(tag_tracker);
But not this?
tag_tracker = <%= @tag %>; // Why is this not read as a string?
alert(tag_tracker);
Thank you in advance!
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1 Answer
If you have JS inside of ERB files, you need to ensure that the javacript code that is generated is correct.
Let's assume that you have a string "div" stored in @tag
The first option:
tag_tracker = "<%= @tag %>";
alert(tag_tracker);
will generate a correct JS with div wrapped in quotes.:
tag_tracker = "div";
alert(tag_tracker);
The second one:
tag_tracker = <%= @tag %>;
alert(tag_tracker);
will generate JS without quotes around the div:
tag_tracker = div;
alert(tag_tracker);
and that is incorrect, because in this case div is interpreted as a variable, not as string.
1 Comment
Frederik Spang
For strings, using
<%= @tag.inspect %> outputs "div" as well.. Although inspect will work for strings, integers and arrays, it will not work for Hashes. Although .to_json will in rails apps.